A study published April 2009 in the Archives of Neurology found that older patients taking aspirin appeared more likely to have barely-perceptible bouts of cerebral “microbleeding,” detected by researchers with the aid of magnetic resonance imaging (MRI) technology.

The abstract and fulltextpaper can be read/downloaded at the link below:

Use of Antithrombotic Drugs and the Presence of Cerebral Microbleeds